CN107246466B - A one-way transmission structure - Google Patents

Abstract

The invention provides a one-way transmission structure, which includes a bracket plate. The bracket plate is provided with an output shaft, a transmission shaft and a positioning shaft. The transmission shaft is provided with a one-way sprocket and a one-way sprocket shaft. The one-way sprocket is connected to the output shaft chain; a driving sprocket is provided on the positioning shaft, and the driving sprocket includes a fixed part that rotates around the positioning shaft and a first sprocket located on the fixed part. Ring part and second sprocket ring part, the one-way sprocket shaft is provided with a first driven sprocket and a second driven sprocket, the first sprocket ring part and the first driven sprocket A first chain is connected between them, and a second chain is connected between the second sprocket ring part and the second driven sprocket. The first chain and the second chain move relatively in one direction from the gear shaft. The direction is opposite; it also includes a tension spring, one end of which is arranged on the fixed part, and the other end is connected to a swing arm.

Description

A one-way transmission structure

Technical field

The present invention relates to a transmission, and in particular to a one-way transmission structure.

Background technique

Since the launch of the National Fitness Movement, the role of physical exercise on people's health has been generally recognized by everyone, and the market demand for various types of fitness equipment has increased year by year. In the process of people using fitness equipment, the huge physical energy consumed is converted into mechanical energy and frictional heat energy of the mechanical movement of the fitness equipment. How to use this mechanical energy has attracted more and more people's attention.

There are more and more studies on the energy reuse of fitness equipment, among which fitness power generation is the main way to reuse the energy of fitness equipment. The manual input structure of fitness equipment often involves reciprocating swings and movements. How to convert similar compound motion forms into one-way rotation and ensure stable output is an important issue.

Contents of the invention

The object of the present invention is to provide a one-way transmission structure that can convert the reciprocating swing translation motion into one-way rotation of the output shaft.

In order to achieve this goal, the present invention adopts the following technical solutions:

Includes support plate, characterized by:

The bracket plate is provided with an output shaft, a transmission shaft and a positioning shaft. The transmission shaft is provided with a one-way sprocket and a one-way sprocket shaft. The one-way sprocket is connected to the output shaft chain;

A driving sprocket is provided on the positioning shaft, and the driving sprocket includes a fixed part that rotates around the positioning shaft, and a first sprocket ring part and a second sprocket ring part located on the fixed part, and the The first sprocket ring portion and the second sprocket ring portion are located in parallel planes, the one-way sprocket shaft is provided with a first driven sprocket and a second driven sprocket, and the first sprocket ring A first chain is connected between the first driven sprocket and the second driven sprocket, a second chain is connected between the second sprocket ring part and the second driven sprocket, and the first chain is connected to the third driven sprocket. The two chains lead out in opposite directions relative to the one-way sprocket shaft;

It also includes a tension spring, one end of which is arranged on the fixed part, and the other end of which is connected to a swing arm.

As a result, the external force drives the swing arm to rotate and translate and stretches the tension spring to drive the driving sprocket to rotate. After the external force disappears, the driving sprocket rotates in the opposite direction under the action of the tension spring, and cooperates with the reversely wound first chain and the second chain to drive the chain. One-way sprocket shaft rotation.

Preferably, a tensioning wheel is provided on the bracket plate, and a chain is provided around the tensioning wheel, the output shaft and the transmission shaft.

From this, adjust the tightness of the chain to ensure transmission efficiency.

Preferably, the one-way sprocket and the one-way sprocket shaft are connected through a one-way ratchet mechanism.

Thus, the transmission between the one-way sprocket shaft and the one-way sprocket is realized through the one-way ratchet mechanism.

Preferably, the one-way sprocket shaft is provided with an annular groove, and the first driven sprocket and the second driven sprocket are respectively located in the annular groove.

Thereby, the wound chain is limited in position.

Preferably, the first sprocket ring part and the second sprocket ring part are arranged oppositely on both sides of the positioning shaft.

Preferably, the swing arm is located between the first sprocket ring portion and the bracket plate.

Preferably, the first sprocket ring part and the second sprocket ring part are provided with openings, and the swing arm includes two mutually parallel swing plates, and the two swing plates are connected by Post connection, the connecting post is disposed through the opening on the second sprocket ring portion.

Therefore, when the connection between the swing arm and the tension spring fails unexpectedly, the second sprocket ring portion blocks the swing arm and limits its displacement.

Preferably, the inner width of the inner section of the second chain is 12-18mm, and the inner width of the inner section of the first chain is 8-12mm.

Therefore, when the swing arm is stretched, the influence of the first chain on the movement of the swing arm is reduced.

In summary, the present invention has the following advantages: it converts reciprocating swing and moving motion into one-way rotation of the output shaft, has a simple and compact overall structure, low cost, easy installation and maintenance, high safety, and wide application range.

Description of the drawings

Figure 1 is a schematic structural diagram of the present invention;

Figure 2 is a front view of the present invention;

Figure 3 is a side view along the direction A-A in Figure 2;

Figure 4 is a schematic structural diagram of the swing arm and the driving sprocket.

The labels in the figure are as follows:

1. Bracket plate, 2. Drive shaft, 21. One-way sprocket, 22. One-way sprocket shaft, 221. The first driven sprocket, 222. Second driven sprocket, 223. Annular groove, 3 output shaft, 4. Positioning axis, 41. Driving sprocket, 411. Fixed part, 412. The first sprocket ring part, 413. The second sprocket ring part, 5. The first chain, 6. Second chain, 7. Tension spring, 8. Swing arm, 81. Oscillating board, 82. Connecting column, 9. Tension wheel.

Detailed ways

The present invention will be further described below in conjunction with the embodiments in the accompanying drawings.

As shown in FIGS. 1 to 4 , the one-way transmission structure includes a bracket plate 1 . The bracket plate 1 is provided with an output shaft 3, a transmission shaft 2 and a positioning shaft 4. The rotation axes of the above-mentioned shafts are arranged perpendicular to the bracket plate 1. The transmission shaft 2 is provided with a one-way sprocket 21 and a one-way sprocket shaft 22. The one-way sprocket 21 is connected to the output shaft 3 by a chain. The one-way sprocket 21 rotates in one direction and drives the output shaft 3 to rotate through the output chain.

The positioning shaft 4 is provided with a driving sprocket 41. The driving sprocket 41 includes a fixed part 411 that rotates around the positioning shaft 4, and a first sprocket ring part 412 and a second sprocket ring part 413 located on the fixed part 411. The sprocket ring portion 412 and the second sprocket ring portion 413 are located in parallel planes. The one-way sprocket shaft 22 is provided with a first driven sprocket 221 and a second driven sprocket 222. A first chain 5 is connected between the first sprocket ring portion 412 and the first driven sprocket 221. The second chain The second chain 6 is connected between the ring portion 413 and the second driven sprocket 222 , and the first chain 5 and the second chain 6 lead out in opposite directions relative to the one-way sprocket shaft 22 . The first chain 5 and the second chain 6 are wound in opposite directions around the axis of the one-way sprocket 21. When the driving sprocket 41 reciprocates in two directions under the action of external force, the first sprocket ring portion 412 and the second sprocket ring One of the parts 413 drives the chain between it and the one-way sprocket shaft 22 to stretch and drive the one-way sprocket shaft 22 to rotate. The reciprocating rotation of the one-way sprocket shaft 22 is converted into the one-way rotation of the one-way sprocket 21.

The one-way transmission also includes a tension spring 7. One end of the tension spring 7 is provided on the fixed part 411, and the other end is connected to the swing arm 8. The movement of the swing arm 8 causes the tension spring 7 to stretch and the driving sprocket 41 to rotate. After the external load acting on the swing arm 8 is reduced or disappears, the driving sprocket 41 reversely rotates under the action of the tension spring 7 .

The bracket plate 1 is provided with a tensioning wheel 9, and a chain is provided around the tensioning wheel 9, the output shaft 3 and the transmission shaft 2 to adjust the tightness of the chain and ensure transmission efficiency. The one-way sprocket 21 and the one-way sprocket shaft 22 can be connected through a one-way ratchet mechanism to realize transmission between the one-way sprocket shaft 22 and the one-way sprocket 21 .

As shown in FIG. 1 , the one-way sprocket shaft 22 is provided with an annular groove 223 , and the first driven sprocket 221 and the second driven sprocket 222 are respectively located in the annular groove 223 . Therefore, the wound chain can be limited in position to prevent the chain from sliding to both sides during the winding and relaxing process and causing a sudden change in chain tension, thereby ensuring the stability of the transmission structure during operation.

The first sprocket ring portion 412 and the second sprocket ring portion 413 are arranged oppositely on both sides of the positioning shaft 4 . The swing arm 8 is located between the first sprocket ring portion 412 and the bracket plate 1, making the structure more compact. The first sprocket ring portion 412 and the second sprocket ring portion 413 are provided with openings. The swing arm 8 includes two mutually parallel swing plates 81. The two swing plates 81 are connected by a connecting column 82. The connecting column 82 passes through It is disposed through the opening on the second sprocket ring portion 413. At this time, when the connection between the swing arm 8 and the tension spring 7 fails unexpectedly, the second sprocket ring portion 413 can block the swing arm 8 to limit its displacement to avoid sudden changes in the displacement of the swing arm 8 and causing harm to the bodybuilder. .

The inner width of the inner section of the second chain 6 is 12-18mm, and the inner width of the inner section of the first chain 5 is 8-12mm. Since the inner width of the inner section of the first chain 5 is small, stretching the swing arm 8 at this time can reduce the impact of the collision between the first chain 5 and the sprocket and the impact of vibration on the movement of the swing arm 8, thereby improving the user's comfort. , to avoid excessive vibration causing cumulative damage to the user's joints and muscles. When the swing arm 8 moves under the tension of the tension spring 7 , the contact area between the second chain 6 and the sprocket teeth is large enough to allow the swing arm 8 to retract stably without causing the second chain 6 to move behind the tension spring 7 The sprocket is dislocated under the action of uneven load and cannot mesh smoothly with the sprocket.

The one-way transmission structure can be used in fitness equipment, such as tensioners, butterfly machines, steppers, etc., and can also be used in scooters, bicycles, etc.

The above description is only an explanation of the present invention, so that those skilled in the art can completely implement the present solution, but it does not limit the present invention. After reading this description, those skilled in the art can make modifications to this embodiment as needed without inventiveness. Modifications contributed by the invention are non-creative modifications, but are protected by the patent law as long as they are within the scope of the claims of the invention.

Claims (6)

1. A one-way transmission structure comprising a carrier plate (1), characterized in that:

an output shaft (3), a transmission shaft (2) and a positioning shaft (4) are arranged on the support plate (1), a unidirectional sprocket (21) and a unidirectional sprocket shaft (22) are arranged on the transmission shaft (2), and the unidirectional sprocket (21) is connected with the output shaft (3) through a chain;

the positioning shaft (4) is provided with a driving sprocket (41), the driving sprocket (41) comprises a fixed part (411) rotating around the positioning shaft (4), and a first sprocket ring part (412) and a second sprocket ring part (413) which are positioned on the fixed part (411), planes of the first sprocket ring part (412) and the second sprocket ring part (413) are parallel, the unidirectional sprocket shaft (22) is provided with a first driven sprocket (221) and a second driven sprocket (222), a first chain (5) is connected between the first sprocket ring part (412) and the first driven sprocket (221), a second chain (6) is connected between the second sprocket ring part (413) and the second driven sprocket (222), and the leading directions of the first chain (5) and the second chain (6) are opposite to the unidirectional sprocket shaft (22);

the device also comprises a tension spring (7), wherein one end of the tension spring (7) is arranged on the fixed part (411), and the other end of the tension spring is connected with a swinging arm (8);

the first sprocket ring part (412) and the second sprocket ring part (413) are oppositely arranged at two sides of the positioning shaft (4);

the swing arm (8) is located between the first sprocket ring part (412) and the bracket plate (1).

2. A one-way transmission structure as defined in claim 1, wherein: the support plate (1) is provided with a tensioning wheel (9), and a chain is arranged around the tensioning wheel (9), the output shaft (3) and the transmission shaft (2).

3. A one-way transmission structure as defined in claim 1, wherein: the unidirectional sprocket (21) is connected with the unidirectional sprocket shaft (22) through a unidirectional ratchet mechanism.

4. A one-way transmission structure as defined in claim 1, wherein: an annular groove (223) is formed in the unidirectional sprocket shaft (22), and the first driven sprocket (221) and the second driven sprocket (222) are respectively located in the annular groove (223).

5. A one-way transmission structure as defined in claim 1, wherein: the first sprocket ring part (412) and the second sprocket ring part (413) are provided with openings, the swinging arm (8) comprises two swinging plates (81) which are parallel to each other, the two swinging plates (81) are connected through a connecting column (82), and the connecting column (82) penetrates through the openings in the second sprocket ring part (413).

6. A one-way transmission structure as defined in claim 1, wherein: the inner section of the second chain (6) is 12-18mm in inner width, and the inner section of the first chain (5) is 8-12mm in inner width.